I am a member of this forum as a parent but since I am also chair of the physics department at ESU, I might be able to provide some helpful information (hopefully, not so biased).
Both programs have an active student group (called the Society of Physics Students) but the Kutztown group is more active. Part of the reason for that is that the Kutztown program has more students (Kutztown university itself is larger). ESU probably has 90-100 students in physics-related majors but only about a third are straight physics majors (BA or BS in physics). We also have programs in earth and space science (both as part of the BA in Earth and Space Science, and as a concentration within our BS physics), engineering, and secondary education.
I suggest you contact each department, if you haven't already, to discuss your interests. At ESU, we are proud of the fact that our graduates do very well in graduate school and in tests like the physics GRE, but I don't know how we compare to Kutztown in that regard. And, if you are interested in research, you should look into what kind of research is being done at each school.